There are different seasons tents out there and you should look at the one you are wanting to buy to see what it is. If you buy a inexpensive one & you want it to last for 3 season it might not be rated for that. Make sure what you are getting is the one you want. So what is a 2 season?
Two-Season:
Generally very inexpensive typically "fair weather" or summer tents. There exists no hard and fast rules when buying a two season or summer tent, but there are some features of these tents that must be known, in order to make the investment worth, like: